Rosemary essential oil is often used for alertness and stimulating memory. Dap a little into a handkerchief or cotton ball and inhale as needed. It can also keep you alert during long car trips or a long day at work. You Might Also Like Essential oils that can help with asthma November 5, 2013 Aromatherapy for panic attacks or anxiety attacks September 20, 2017 Elderberry herb November 14, 2013